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Whats better kjams pro or kjams24/19/2023 Syntax that would have no need to admit any kind of brackets.įrom steve+ at Wed Sep 11 20:09:48 2013įrom: steve+ at (Steven D'Aprano) Removing that feature would allow a simplification of the lambda I guess it's related to the removal of auto-unpacking of arguments. > violate the 'principle' that extraneous parentheses are usually allowed/ignored > In py2.7 this was accepted, but not in p圓.3. On 11 September 2013 14:03, Neal Becker wrote: Violate the 'principle' that extraneous parentheses are usually allowed/ignoredįrom oscar.j.benjamin at Wed Sep 11 09:11:22 2013įrom: oscar.j.benjamin at (Oscar Benjamin) In py2.7 this was accepted, but not in p圓.3. Incidentally, class names, module names, and top-level function namesĪre also global, and these are normally not changeable.įrom ndbecker2 at Wed Sep 11 09:03:49 2013įrom: ndbecker2 at (Neal Becker) The first isĪlways the same, and the second is initialized before anyone will use Globals are things like math.pi or command-line options. If it's changeable, it usually should NOT be global. Statement inside a method, as with any other function.īut the main question is probably, why are you so hung up on globals? There are classĪttributes which are sort-of global, and it's legal to use the global There are no global variables inside a class. > Similarly, how can i use global variable inside a class and use the same value of global variable in different class?Is that possible?if Yes please give me some pointers on implementing. Then if you're still confused, ask again. Script, and which as the module, then clean up the other problems, and Rebind one of them (inside globalValmethod()), the other remainsĪfter you rename your files so I can tell which one is intended as the If you have two names bound to the same object, and you > In Test2.py file I wanted to print the global value ,Debug_Value as 10.I'm not getting expected result.Please can any one point where exactly i'm doing wrong.Īfter you fix the above, you'll still have the problem that youĪpparently don't understand that these "variables" are names referring You omitted any top-level code, so this function won't be called anyway. I wish the above syntax were not in the language. > globalValmethod() -Execute the methodīad practice. Second copy of the script, pretending it's a module, and you'll be Any time you have recursive imports, you can expect Which one is the script, and which one an imported module? You haveīugs ether wayl, but different ones. > Here is what i have tried so far without much success.Please ignore any Python doesn't have such a thing, unless you consider builtins. > I'm trying to understand using global variable across different modules. The less coupling there is between modules the easier it is to understand and test.įrom davea at davea.name Wed Sep 11 16:02:32 2013 A significant advantage of not using globals (except for system wide constants) is that is makes testing of individual modules easier. > Also remember that accessing any form of global that is shared between multiple threads is a recipe for disaster unless appropriate locks are used. On the other hand I appreciate simple constant assignments should be easy enough to change without needing to know any Python. Thus users without python experience might find it easier to change them without having to look at any python code. Later the constructor could be changed to read the constants from an initialisation file of your own format (e.g.ini or JSON). Also if the constants are put inside a class, possibly with getter methods, instantiated as a singleton then initially the values can be typed directly into the preferences file. It is good in that system wide constants are defined in one place only. > As to global usage I do find it useful to have a file called something like 'preferences.py' and put in there constants to be used throughout the application. > would only change stdout in the current module and sys.stdout would remain unchanged. > Thus assigning to sys.stdout would change the standard out destination in every module importing sys whereas > (the latter being a convenience to avoid having to write sys. > That being the case it would be wrong to assume that the following are identical > I take it then that assigning to Debug_Value in Test2.py will not change the value of Debug_Value in Test1.py. Just wasted space in each copy of the message (where space is money).īut next time it might lead to indentation problems and otherįrom johnhpote at o2.co.uk Wed Sep 11 20:10:07 2013 Try fixing your email program to use text, not html.
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